Glass-drawing apparatus.



W. Wislm.A

GLASS DRAWNG APPARATUS.

APPLICATION FILED MAY 10. 1916.

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@LMS-DRAWING APPARATUS.

To all avlium t may concern .r

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Be it lrnovvn that'l, Wierden Wnsrnouv, a citizen ci the United States, residing at tOltmulgee, in the county of Okmulgee and State ot "Oklahoma, have invented new and useitul Improvements in Glass-Drawing Ap paratus, of which the following is a specilinationn v p This invention is an improved glass pot and hiln of the type employed in glass dravving apparatus. f v

llt is common practice in the glass draw ving art, to employ rotatable glass pots ot double form, i. e., having oppositely arranged glass receiving cavities, with a single bottom Wall between them, so arranged that one cavity is inverted during the drawing operation trom the other cavlt 'lhe heat maintained Within the kiln ten s to keep the lower part of the v lass bath in the upper most cavity, at the esired temperature, and also tends to melt out any glass remaining in the inverted cavity, during the drawing1 :trom the said uppermost cavity. ln prac` tice, however, it has been found necessary vity, causingI blisters, etc., during the neat draw, nnless removed, 1t being inlpomlble to remove them, however, Without coriander-` able loss oi time and Waste of heat.y

Specification ot Letters Patent. applica-eas niet nay io, taie. sei-iai no. naait.

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iorm temperature, and to equalize the en' pension caused by molten @glassA enterinflt either cavity when in drawing position. further object is to provide improved means for moving the top stone of the kiln to peru mit of rotation'of the pot.

The invention will be hereinafter fully set forth and particularly pointed ont in the claims.

ln the accompanying drawin Figure l is a ,side elevation ilustrating' a glass pot and kiln constructed in accordance with theinvention. lllig. 2 is a longitudinal sectional view onthe line 9;--2 Fig. l. Fig. 3 is a similar sectional view on line '3-3 Fig. 2. ]Hg. d is a detail view illustrating the top stonev operating mechanism.'

Referring to 'the drawing, l0 designates a kiln, which may be of any preferred type, provided With the burners 11, and the outlet opening l2 "in its bottom. .Said itiln is also provided with oppositel'jv disposed vertical slots 13 at its upper ed e.

The glass pct is ot the inver-tibio or twin type, being formed oi' two cavity sections lll and 15, each beingaduplicate oi the other, and 'each having its own independent bot- .toin vvall'ltl, shaped to toria a triisto conical bottom lor the pot, said bottom Wall being' ci lnibstantiallv uniform thclmess .through out. "lhe bottom Walls iti rest one upon the other, or abut at their centers, as indicated at l'l', to providean annular heating space, andeach pot is provided With oppositely disposed trunnion members itl, ol. semi-cin cular form, the dat sides 19 ci said members abutting each other, in alinement with the abutting portions ll, to l'orm vcirrnilar trunnionspvvhich project above the cnrvedvhot tomsV ot "the slots i3. "lhetrunnions are lili ilu

p f shaped tolsanthe heating space. The. sed t @ne el the objects ol2 the present invention t tions ld an lgmay be locked inanvl suitable is to provide a rotatablepotjot the type .inamien'so asmtoturn in unison apenY thans t above referred to, having cavities so contrunnionaln therfdravving, the construction strncted that the pot maT be at once in illustrated ilor thispurpose, com rises cir- 1 vented, and anylltnobs or projections'vvhich l nlar locking heads 2li, havingt cir inner might form on the bottom of 'the la'stused faces provided with locking lngsl, shaped cavity, may be melted od during the-period lto enter recesses 22 formed in the 'trunnions lo@ required for the draw from the othercavity.

` l8,=said locking heads being provided with A, further Objectis-to provide means iirhere-v short shafts it-mounted in at :instable been by heat may be introduced between the caviin'os 2t, ,ot well lrnovvn, constituction. .lho ties, to maintain all parte ot the pot at nni lodging heads 20 are'preierahlp at e i i titl' nfs convex form, the concaved face being on the inside and provided with the liigs 21, said locking heads being surrounded by sectional blocks and 26, to fill the slots 13. f rEhe top stone 27 ma, be et any preferred construction, but as illustrated in the drawing is made in the form of an arch," flat across the bottom so that it cannot crack and tall out of the metal jacket, said top stone being formed of two sections, each having a semi-circular opening to conform t0 the contour of the glass drawing pot. The sections ot the top stone are supported by operating arms Q8, eccentrically connected by crank pins with pinions 29, which mesh with racks 30, extending on opposite sides of the kiln, a lever 31 being provided to shift said rack longitudinally. The glass pot is rotated in any well known manner, the rotating mechanism being conventionally illustrated.

ln oper-ation, the uppermost glass p/ot, 14 for instance, is lilled With-moltenvg'lass in the usual way, and the drawing-operation completed in accordance with accepted practice. Itlv will be noted that by reason of the conical shape of the bottoms of the pots, a substantially annular space is formed between the pots, permitting the heat to pass in between the pots, whereby all parts thereof are maintained at a uniform tempera ture, and no unequal expansion results by reason of molten glass being placed in the uppermost pot. Likewise any `Knobs or pro'- iections of glass which may have formed on the bottom of the pot 15 for instance, are fp :ly melted o'lla by the heat in the space between the bottoms of the pots, as well as by the heat from the burners 11 impinging directly thercagainst. After the drawing operation has been completed Jfrom thev pot 14, the lever 3i is operated to shift the rack 30, which results inthe elevation of the scctions ot the top stone 27 in a horizontal position, by the gears 29. The pots are then reversed by means of rotating power applied to the shaft Q3, bringing pot 15 to thc top, and inverting pot 14. As soon as the pots are reversed, the lever 3l is reversed, effecting the lowering of the top stone, whereupon the drawing operation may be at once started. As the drawing operation progresses, and before its completion, the inverted pot is thoroughly cleansed ol any particles of glass adhering thereto, so that no delay is necessary after any of the drawing operations, as each pot is ready for use before it is brought to drawing posit ion.

Having thus explained the nanre of my invention, and described an onirative manner' of constructing and using the same, although without attempting to set forth all of the forms in which it may be made, or all of the forms of its use, what I claim is:

"l, An improvement in glass drawing apmesses paratus comprising a reversible glass drawing pot formed of two separable cavity sections having abutting bottom walls and abutting trunnion members, an annular space being provided between the sections, said trunnion .members bridging said space, and means for normally preventing separation of the sections. f

2. )in improvement in glass drawing ap- 'paratus comprising a reversible glass drawing pot formed of two separable cavity scctions provided with truste-conical bottoms the tlat portions of which are abutted, the contiguous conical portions forming an annular space, said sections being provided with abutting trunnion members bridging said space, and means for normally preventing separation of the sections.

3. An improvement in glass d awing apparatus comprising a reversible glass drawing pot formed of two separable cavity scctions having abutting bottom walls and abutting trunnion members, an annular space being provided between the sections, said trunnion members bridging said space, and rotatable supporting members having means for normally preventing separation of the Sections.

Ll. An improvement in glass drawing apparatus comprising a reversible glass drawing pot 'formed of two separable cavity scctions having abutting bottom walls and abutting trunnion members, an annu-lar space being provided between the sections, said trunnion .members bridging said space, locking heads, said locking heads and trunnions having complementa] interengaging portions,and means for rotatably supporting said heads.

5. An improvement in glass drawing apparatus comprising a reversible glass drawn ing pot formed of two separable cavity sections having abutting bottom walls and abutting trunnion members, an annular space being provided between the sections, said trunnion members bridging said space, circular locking heads of concavoeonvox `form, thc concave sides ot' said heads having lugs engaging said trunnions, and means for r0- tatably supporting said locking heads.

(3. As an improvement in glass drawing apparatus, a reversible pot having oppositely arranged glass receiving cavities, a top sione having an opening through which said'pot may project, rigid arms depending from said top stone, pinions to which the lower ends of said arms are eccentrically connected, and means for simultaneously actuating all of said pinions to raise and lower the top stone.

7. As an improvement in glass drawing appa 1atus, a reversible pot having oppositely arranged glass receiving cavities, a sectional top stone having an opening through which said pot may project, op-

grating arms depending from the 4respectc'e my hand in presence of two subscribing wi- .sctlons of tletop sone, pinions to whlch nesses. t e ower en sof-sai arms are eccentrica 41y l l oorinected,'racks engaging said pinions, an WILLAM WESTBUB'Y' 5 means for simultaneously shifting "said Witnesses:

racks, J l s W. P. RolsoN,

Kn testimony whereof have hereunto set H. L. GREENWALT. 

